1640650167740 has 24 divisors (see below), whose sum is σ = 3447090706752. Its totient is φ = 655931428160.

The previous prime is 1640650167733. The next prime is 1640650167769. The reversal of 1640650167740 is 477610560461.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20498996 + ... + 20578875.

It is an arithmetic number, because the mean of its divisors is an integer number (143628779448).

Almost surely, 2^{1640650167740} is an apocalyptic number.

1640650167740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640650167740 is an abundant number, since it is smaller than the sum of its proper divisors (1806440539012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640650167740 is a wasteful number, since it uses less digits than its factorization.

1640650167740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41079877 (or 41079875 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 1640650167740 in words is "one trillion, six hundred forty billion, six hundred fifty million, one hundred sixty-seven thousand, seven hundred forty".